Benelli made them yes, but did they import any in to canada? Maybe not. You'd need to contact Stoeger Canada and see if they could give you an answer. There is a shop with an after market m1/m2 LH 20ga 28" barrel for sale in Canada, so if you had one with a 26, could always get the 28 and sell the 26.
My personal experience? I have a m2 20ga LH with a 26" and Ill take that every day of the week over my SBE 2 LH with a 28". 26" swings faster, gets on target sooner and works out of a blind better.